Door-check.



F. J. SPRING.

DOOR CHECK.

APPLIOATIONHLBD MAY 1s, 1912.

1,052,019, Patented Feb.4,1913.

WITNESSES FRANK J. SPRING, OF READING, PENN SYLYANIA.

DOOR-CHECK..

Specification of Letters Patent.

Patenten Feb. 4,1913.

- Application filed May 16, 1912. Serial No. 697,606.

To all whom t may concern.'

Be it known that I, FRANKYJ. SPEING, a citizen of the United States,residing at Reading, in the .county of Berks and State.

of Pennsylvania, have invented certain new and useful Improvements inDoor-Checks, of which the following is a specication.

This invention relates to improvements 1n door checks and the object isto provide a device of simple construction that may be applied withequal facility to either a right or left hand door, and one which may bechanged from a right to a left hand door action without removing orchanging any. of theparts, the device being free toact 1n eitherdirection and being provided with means for attaching it to the doorjamb so that it will be in position for either movef mentof the door. I

The device is so constructed that the door may be opened with a minimumof eort and the return of the door is substantially uniform during.almost the whole of its closing path.

The invention is more fully described 1n the followin specification andclearly illustrated in t e accompanying drawing, in which yFigure 1 isaplan view, showingmy device in position on a closed door, with the lopen position shown dotted.v Fig. 2 is a central longitudinal sectionofthe casing. Fig. 3 is a detail of the by-pass regulating screw. Fig.4: is a .detail of the roller bearing. v

The numeral 1 designates a door and 2 the jamb. i

3 designates the check casing which has a cover 4 formed with a securingplate 5 by means of which it is secured to the door.

The device is provided witlrthe usual arm 7 for connection tothe doorjamb and in this case .I form this arm witha ball and socket joint atits connection with the check operating arm 8. This arm 8 is secured toa vertical shaft 9 located in the check casing, passing through thecover, and formed at its lower extremity with an anti-friction surface10 adapted to rest in a suitable cuplike depression 11 in the bottom ofthe casing, so as to reduce the friction at this point to a minimum. Anyother simple ball bearing may be employed if desired. Inside the casing,and secured to the shaft 9 by means of a pin 12 is located a movable orrotary cylindrical member 15', adapted to turn with the shaft. Thismember is formed with one or more inclined 'faces on its lower edge, andat its lowermost .pq-int it is provided with suitable anti-frictionrollers 17 In the casing, below this hrotatable member, I secure a likecylindrical member 18, adapted to move only in a vertical direction inthe casing, being guided by one or more guide strips 19, and formed atits upper edge with inclmed surfaces corresponding with thosev on vtheupper member, and against which the rollers 17 will bear when thel uppermember is. rotated. These members 15 and 18 are hollow and thel member18 is provided with a valve 20 to permit the passage of the liquid 21,as is usual in this .type of check.

This member 18 is backed by a spring 22 which serves to keep it innormal position against the upper member, and a by-pass 23 1s formed inthe wall thereof, provided with a regulating screw 24.

With the parts in position as shown, the

'closing of the door-will cause the shaft 9 to turn in the casing and toturn with it the upper member 15; thismovement will force the lowermember 18 down on the guides, through the action of the'rollers-on theinclined surfaces; as it is thus moved, the liquid in the casing will beforced slowly through the by-pass 23 and permit the slow and regularclosing of the door. When the door'is fully closed, the liquid' will beinsider the lower member, which member will be in the lower end ofthecasing, and the rollers will be at thev top of the inclined surfaceson said member. The opening of the door, will, as is usual, turn the armand shaft 9 in the opposite direction, and permit the lower member 18,through the action of the spring 22, to ride up with relation to theupper member, and'when this movement begins, the valve 20 will open andpermit the liquidv to pass out easily, thus permitting the door to beopened without undue eort.V The only resistance in opening the door, isthe usual closing spring 26, which, in this case is inclosed in atubular member secured to the operating arm at its jointure with thejamb connecting arm 7. The spring` is joined to the casing in anysuitable manner, so that when the door opens, as shown in Fig. 1, thespring is drawn into tension so that when the door is released it willact to close it. This closing is slightly aided however by the action ofthe spring in the check casing whose action is at all times opposed tothat on the operating arm. Y

It is evident that to apply my device to a left hand door itis onlynecessary to place the operating arm on the opposite side oi the casingfrom that shown in Fig. 1 and secure the arm 7 to the jamb on that side.

AInasmuch as the parts 'are free to swing' nected to the casing cover, ajamb engaging arm connected with the check operating arm and adapted tobe, swung from one side of the casing t-o the other, whereby to holdsaid check operating arm in position for right or left hand action, arotating cylindrical member within the casing and secured to the shaft,said member having an inclined lower edge, a roller secured to thelowermost point of said member, a second cylindrical member having itsupper edge inclined and adapted to be engaged by the rollers and to bemoved vertically in a downward direction by the rotary action of theupper member, guides for the lower member, said member having a valve inits lower wall and a by-pass in its vertical wall, a regulating screwformed with a slotted bearing point located in the by-pass and a springwithin the casing to keep the said cylindrical members normally incontact with each other.

2. In a reversible door check and closer the combination of acylindrical casing formed with a cup like receptacle in its bottom, arotary shaft seated therein, a reversible operating arm connected to theshaft, a cylindrical member rotatably mounted on the shaft and locatedwithin the casing, said Loeaoie member having its lower face inclined, a

'whereby the rotation of the upper cylindrical member will move thelower cylin drcal member in one direction, a spring lo cated between thebottom of the Icasing and the lower member to move the said member inthe opposite direction, a valve in the bottom of the lower member, avertical slot in the outer wall of said lower member to serve as aliquid bypass and a regulating screw formed with a slottedbearing-pointppassing through the casing wall Aand adapted to regulatethe passage of liquid through the bypass. f Y

3. In .a reversible door check and closer the combination of a casing, acover therefor provided with means for securing it to the door, areversible operating arm having means for securing it to the door jambfor either right or left hand action, a pair of cylindrical cams in thecasing, one of whichy is mounted for rotary movement within the casingand the other for vertical movement therein, means on the rotary cam formoving the vertically movable cam in a downwardly direction, a springfor moving said vertil cally movable cam in an upwardly direction, ashaft to which the rotary cam is secured, a bearing in the bottom of thecasing for the shaft, a valve in the vertically movable cam, guides inthe inner wall` of the casing -for said vertically movable cam, aby-pass in said vertically movable 4cam and a slottedscrew in theby-pass to regulate the flow of liquid therethrough. Y

. In testimony whereof I afix my signature in presence of two Witnesses.

FRANK d. SPRING.

Witnesses:

CLARA E. YOUNG, HAROLD A. WHITE.

Copies of this patent may be obtained for ylive cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

'fory

